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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Tea placed in thermos flask is an example of
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Correct option: C
Isolated system
Option C (Isolated system) is correct because a thermos flask is designed to prevent the exchange of both heat and matter with the surroundings, approximating an isolated system.
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The internal energy of one mole of a gas is:
An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If is the initial temperature and is the final temperature, which of the following statements is correct?
For which of the process, ∆S is negative?
The work done by a weightless piston in causing an expansion ∆V (at constant temperature), when the opposing pressure, P is variable, is given by:
Assertion :- At constant pressure of the change work done is negative.
Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is
Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is